Repair Hull Blisters

Repair Hull Blisters
  • Difficulty
    Easy

Introduction

Hull blisters are a common issue for boat owners, but with the right tools and techniques, you can repair them yourself and restore your boat's hull to its original condition. This guide will walk you through the process using the Dremel 124 Carving Bit and Dremel 442 Carbon Steel Brush. For added convenience, some fiberglass fillers can be tinted to match your boat's color, allowing you to skip painting in many cases.

You need
Step15

Identify and Mark Hull Blisters

Hull Blisters

Hull blisters are common on boats, and while they are not immediately harmful, they should be addressed promptly to prevent further damage. Start by inspecting the hull and marking the location of each blister with a pencil or marker.

Step25

Grind Out the Blisters

Grind out the blister with a 124 high-speed cutter

Attach the Dremel 124 Carving Bit to your Dremel Rotary Tool and grind out the blister, removing the damaged material. For optimal control and safety, operate the tool at a recommended speed of 15,000 rpm. Carve out the entire blister, ensuring all loose material is removed.

Step35

Clean the Hole

Clean the hole with 442 carbon steel brush and Wipe away dust with cloth

Once the blister is ground out, clean the hole thoroughly. Use the Dremel 442 Carbon Steel Brush to remove any remaining debris and contaminants. It's important to keep the tool speed at 15,000 rpm to avoid damaging the hull. After brushing, wipe away any dust with a cloth dipped in paint thinner to ensure the surface is ready for repair.

Step45

Fill the Hole with Fiberglass Filler

Fill hole with fiberglass filler and resin dry scuff and paint

Fill the cleaned hole with a fiberglass filler mixed with resin. If desired, tint the filler to match your boat's color, which can allow you to skip the painting step in many cases. After the filler has dried, scuff the surface lightly to prepare it for painting or applying a gel coat if necessary.

Step55

Sand and Finish the Repair

Once the filler is dry and scuffed, sand the area smooth with your Dremel Rotary Tool. If you've tinted the filler to match your boat, you may not need to paint the area. However, if additional finishing is required, apply a layer of marine paint or gel coat to protect the repair and blend it seamlessly with the rest of the hull.

Repairing hull blisters on your boat can be efficiently managed with the right tools and a little know-how. The Dremel 124 Carving Bit and Dremel 442 Carbon Steel Brush provide the precision and control needed to handle this task effectively. 

Remember, if you tint your fiberglass filler, you might be able to skip the painting step, saving you time and effort. By following these steps, you can restore your boat's hull to a smooth, blister-free condition, ensuring it remains in top shape for your next adventure. 
Trust Dremel for all your marine repair needs, and keep your boat performing at its best.


Warning

To reduce the risk of injury user must read instruction manuals for all tools used in this project. Wear eye and respiratory protection. Use clamps to support work piece whenever practical.